<template>
    <div>
        <div class="search">
        <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-show="keyword">
        <ul>
            <li 
            class="search-item border-bottom" 
            v-for="item of list"
            :key="item.id"
            @click="handleCityClick(item.name)"
            >
                {{item.name}}
            </li>
            <li class="search-item border-bottom"
                v-show="hasNoData"
            >
            没有找到匹配数据
            </li>
        </ul>
    </div>
    </div>
</template>

<script>
import BetterScroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data(){
        return{
            keyword:'',
            list: [],
            timer: null
        }
    },
    computed: {
        hasNoData(){
            return !this.list.length
        } 
    },
    watch: {
        keyword(){
            if (this.timer){
                clearTimeout(this.timer)
            }
            if (!this.keyword){
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities){
                    this.cities[i].forEach((value) => {
                        if(value.spell.indexOf(this.keyword) > -1 || 
                        value.name.indexOf(this.keyword) > -1){
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted (){
        this.scroll = new BetterScroll(this.$refs.search)
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .search
        height: .72rem
        padding: 0 .1rem
        background: $bgColor
        .search-input
            box-sizing: border-box
            width: 100%
            height: .62rem
            padding: 0 .1rem
            line-height: .62rem
            text-align: center
            border-radius: .06rem
            color: #666
    .search-content
        z-index: 1
        overflow: hidden
        position: absolute
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
        background: #eee
        .search-item
            line-height: .62rem
            padding-left: .2rem
            background: #fff
            color: #666
</style>